"It has been the biggest logistical challenge of my life. We extracted around 5,000 items over the last four weeks, filling 20 40ft containers."

Mr Mullen said there was spectacular boardroom furniture from the seventh floor of the vacated building made by top Irish furniture designers Klimmek, side tables, marble-topped sideboards and high-end executive chairs.

"We also have all the other furniture from throughout the building with desks and side tables in cherry, oak and maple as well as office chairs, computer monitors and keyboards, a fantastic array of potted plants and restaurant and kitchen contents."